I need detailed solutionQuestion # $.$

For the RC cantilever retaining wall shown in the figure below.

Given:

Backfill Soil: $=30,=17\mathrm{.}5k\frac{N}{m^3}$

Base Sand layer properties: $=35,=18k\frac{N}{m^3},$

Reinforced Concrete: ${}_{nc}=23k\frac{N}{m^3},f_c^{\text{'}}=21$MPa,

Required:

$1-$ Calculate the factor of safety against overturning failure and comment on the

results. $.$

$2-$ Calculate the factor of safety against sliding failure, and comment on the results.

$(10pt)$

$3-$ Check whether the stem is safe against shear failure $($at section $($I$-$I$))$ in the figure

below. $(10pt)$

Note: assume cover $=10cm.$